(19)

(11)

EP 2 761 720 A2

(12)

(88) Date of publication A3: 18.07.2013 (43) Date of publication: 06.08.2014 Bulletin 2014/32 (21) Application number: 12778529.3 (22) Date of filing: 27.09.2012

(51) International Patent Classification (IPC):  H02J 9/06(2006.01) (86) International application number: PCT/US2012/057457 (87) International publication number: WO 2013/049285 (04.04.2013 Gazette 2013/14)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 28.09.2011 US 201113247608 (71) Applicant: Eaton Corporation Cleveland, OH 44114 (US)	(72) Inventor: JOHNSON, Robert William, Jr. Raleigh, North Carolina 27615 (US) (74) Representative: Schmidbauer, Andreas Konrad  Wagner & Geyer Patent- und Rechtsanwälte Gewürzmühlstrasse 5 80538 München 80538 München (DE)